Positioning clamp special for unmanned aerial vehicle fuel tank processing

Abstract

The utility model relates to a positioning fixture special for unmanned plane oil tank processing, it includes the fixture base of detachable installation on the machining tool workstation, is equipped with three mutually parallel interval even support plates on the fixture seat body horizontally, the middle line of bottom is on a straight line, is equipped with the support recess of inverted eight characters shape in the middle of each support plate upper portion, is equipped with the tool withdrawal groove in the bottom of inverted eight characters shape's support recess, is equipped with the downside fixed stand in the front two parallel support plate downside respectively from left to right, the upside of third support plate is equipped with upside fixed stand, is detachably fixed with the pressing plate on each fixed stand through bolt, is equipped with the circular arc shape down -pressing opening with opening downward on the pressing plate, three down -pressing openings are completely same. The utility model's fixture can realize the profile positioning to the oil tank contour, and the fixture avoids the thin -walled area of the very thin wall thickness on the oil tank upper wall, but does not affect processing, can guarantee processing precision and other technological requirements while greatly improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to a special machining and positioning fixture for unmanned aerial vehicle (UAV) fuel tanks. Background Technology

[0002] my country's drone technology is currently among the world's leading ranks. The general consumer and small drone market is dominated by electric power. However, drones requiring long endurance and heavy payloads need to be equipped with fuel-powered systems. Currently, fuel-powered drones are also rapidly developing towards longer endurance, higher maneuverability, and lighter weight, placing increasingly stringent performance requirements on their core component, the fuel tank system. Modern high-end drone fuel tanks are generally manufactured using composite materials or lightweight alloys through precision integral molding technology.

[0003] These fuel tanks have highly complex structures, often featuring irregular curved surfaces to achieve conformal integration with the aircraft and maximize space utilization. More importantly, to achieve extreme weight reduction, the tank design incorporates numerous areas of varying thickness, with the wall thickness of some non-load-bearing parts reduced to approximately 1 millimeter. This "as thin as a cicada's wing" characteristic, while bringing significant weight reduction benefits, also presents enormous manufacturing challenges.

[0004] In subsequent machining processes (such as milling interfaces, drilling, etc.), traditional general-purpose fixtures and clamping methods are prone to causing irreversible deformation, vibration, or even breakage in thin-walled areas due to uneven clamping force distribution or cutting vibration, resulting in scrapped parts and low yield.

[0005] Therefore, to ensure the machining accuracy and quality of such ultra-thin-walled, irregularly shaped oil tanks, designing and using specialized fixtures that are perfectly matched to them has become an inevitable choice. Utility Model Content

[0006] The technical objective of this utility model is to provide a special positioning fixture for processing UAV fuel tanks. This fixture is applicable to the outer contour of the fuel tank and can achieve contour positioning. The fixture avoids the extremely thin-walled area on the upper part of the fuel tank, but does not affect the processing. It greatly improves the processing efficiency while ensuring the process requirements such as processing accuracy.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: A special positioning fixture for processing drone fuel tanks includes a fixture base that can be detachably mounted on a machine tool worktable. Three evenly spaced support plates are arranged horizontally from left to right on the fixture base. The three support plates are parallel to each other, and the center lines of their bottoms are aligned. A symmetrical, inverted V-shaped support groove is located at the center of the upper part of each support plate, and a tool relief groove is located at the bottom of the inverted V-shaped support groove. Lower fixing columns are aligned with the lower sides of the first two parallel support plates from left to right, and an upper fixing column is aligned with the upper side of the third support plate. Pressure plates are detachably fixed to the two lower fixing columns and one upper fixing column by bolts. Each pressure plate has a downward-facing arc-shaped pressing opening. The arc-shaped pressing openings of the three pressure plates are identical, and during assembly, the centers of the three arcs must be aligned on the same straight line.

[0008] Furthermore, the arc-shaped downward pressing opening described in this utility model corresponds to and matches the arc shape on the upper side of the fuel tank body.

[0009] Furthermore, the pressure plate of this utility model includes a fixed handle with an integral structure and an arc-shaped downward pressing opening located at the front of the fixed handle. The fixed handle is provided with an elongated fixing hole for connection with bolts on the fixed column.

[0010] The operation process of the above-mentioned special positioning fixture for processing UAV fuel tanks is as follows: First, the fixture base is installed and fixed on the worktable of the machining tool; then, the fuel tank to be processed is positioned according to the processing requirements, and then placed on the support system composed of support grooves on three support plates. Finally, the three pressure plates are fixed to their respective fixing columns with bolts to completely position and clamp the entire fuel tank. Subsequent processing operations can then be carried out.

[0011] The beneficial effects of this utility model are as follows: The special positioning fixture for processing UAV fuel tanks described in this utility model can suspend and fix the fuel tank workpiece to be processed by setting three support plates and corresponding pressure plates. First, it provides suitable processing space for processing tools. Second, the pressure plates corresponding to the first two support plates are set as a group on the lower side, and the pressure plate corresponding to the last support plate is set on the upper side. This ensures that the two sides of the thinnest part of the fuel tank wall are firmly clamped and fixed, which can minimize vibration during processing and ensure that the processing accuracy is not affected. Third, the overall work efficiency is improved, the processing volume is increased, and customer orders can be completed with high quality and quantity while meeting various standards and requirements such as processing accuracy. The tool relief groove at the bottom of the support recess in this invention serves not only as a tool relief groove but also as a protection for the workpiece being machined. This is because the bottom of the workpiece may not be perfectly smooth, with slight protrusions or contact points. The tool relief groove provides space for the tool, ensuring that the entire sidewall of the oil tank can fully conform to the two inclined surfaces of the support recess and preventing damage to protruding parts. The pressure plate structure is adjustable, ensuring that the three pressure plates are perfectly aligned front to back, maintaining a secure and uniform position. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the special positioning fixture for processing UAV fuel tanks and the assembly of the fuel tank according to an embodiment of this utility model.

[0013] Figure 2 This is a schematic diagram of the special positioning fixture for processing drone fuel tanks according to an embodiment of the present invention.

[0014] In the diagram: 1. Fixture base; 2. Support plate; 31. Lower fixed column one; 32. Lower fixed column two; 33. Upper fixed column; 34. Bolt; 4. Pressure plate; 41. Arc-shaped downward pressing opening; 42. Fixing handle; 421. Long strip-shaped fixing hole; 5. Oil tank. Detailed Implementation

[0015] As attached Figure 1 , 2The image shows a positioning fixture for processing fuel tanks of unmanned aerial vehicles (UAVs) according to this utility model. It includes a fixture base 1 detachably mounted on a machine tool worktable. Three evenly spaced support plates 2 are arranged horizontally from left to right on the fixture base 1. The three support plates 2 are parallel to each other, and the center lines of their bottoms are aligned in a straight line. A symmetrical, inverted V-shaped support groove 21 is provided in the center of the upper part of each support plate 2, and a tool relief groove 22 is provided at the bottom of the inverted V-shaped support groove 21. A lower fixing column 31 and a lower fixing... are respectively arranged on the lower side of the first two parallel support plates 2, aligned from left to right. The second column 32 has an upper fixed column 33 aligned with the upper side of the third support plate. Pressure plates 4 are detachably fixed to the two lower fixed columns and one upper fixed column via bolts 34. Each pressure plate 4 has a downward-facing arc-shaped pressing opening 41. The arc-shaped pressing openings of the three pressure plates are identical, and during assembly, the centers of the three arcs must be aligned on the same straight line. The pressure plate 4 includes an integrally formed fixing handle 42 and a downward-facing arc-shaped pressing opening 41 located at the front of the fixing handle. The fixing handle 42 has an elongated fixing hole 421 for engaging with the bolts 34 on the fixed columns. The arc-shaped pressing opening 41 corresponds to the shape of the arc on the upper side of the oil tank 5.

[0016] The operation process of the above-mentioned special positioning fixture for processing drone fuel tanks is as follows: First, the fixture base is installed and fixed on the worktable of the machining tool; then, the fuel tank to be processed is adjusted to the desired position according to the processing requirements, and then placed on the support system composed of support grooves on three support plates. Finally, the three pressure plates are fixed to their respective fixing points with bolts to completely position and clamp the entire fuel tank. Subsequent processing operations can then be carried out.

Claims

1. A special positioning fixture for processing fuel tanks of unmanned aerial vehicles (UAVs), characterized in that: The positioning fixture includes a fixture base that can be detachably mounted on the worktable of a machine tool. Three evenly spaced support plates are arranged horizontally from left to right on the fixture base. The three support plates are parallel to each other, and the center lines of their bottoms are on a straight line. A symmetrical, inverted V-shaped support groove is located at the center of the upper part of each support plate, and a tool relief groove is located at the bottom of the inverted V-shaped support groove. Lower fixing columns are aligned with the lower sides of the first two parallel support plates, and an upper fixing column is aligned with the upper side of the third support plate, arranged from left to right. Pressure plates are detachably fixed to the two lower fixing columns and one upper fixing column by bolts. Each pressure plate has a downward-facing arc-shaped pressing opening. The arc-shaped pressing openings of the three pressure plates are identical, and during assembly, the centers of the three arcs must be aligned on the same straight line.

2. The positioning fixture for UAV fuel tank processing according to claim 1, characterized in that: The arc-shaped downward pressing opening corresponds to the shape of the arc on the upper side of the fuel tank body.

3. The special positioning fixture for processing UAV fuel tanks according to claim 1, characterized in that: The pressure plate includes an integrally formed fixing handle and a downward-facing arc-shaped pressing opening at the front of the fixing handle. The fixing handle is provided with a long strip-shaped fixing hole for connection with bolts on the fixing column.

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